Check the link below. I don't know anything about the site, but I have done drapes before. All you need is a drapery rod suspended from the sides, supported along the way as necessary, and one of the room darkening drapes like shown at the link, and available at most drapery departments of any store. They sell the necessary hardware, but it's brackets you attach to the wall, which stick out and you suspend the drapery rod on the brackets. You buy as many as you need to hold up the weight of the drape. Some rods allow you to put sliding loops at the top of the drapes in case you need to open it, and others are stationary, you pick what you want and as many panels as you need for the area.
Shouldn't cost too much.
http://bed-and-bath.bedbathstore.com...ing%20curtains